What does the appendix do for the body? For a long time, doctors and scientists couldn't figure out the exact function. But recent research has landed on one highly plausible explanation.

Healthline reports that the top five largest organs in the human body are: Skin Liver Lungs Heart Kidneys What to know about your liver The liver is the body’s largest solid, internal organ.

The human body has some organs that are considered "useless" due to their reduced functionality over time. Analysis of some of these vestigial structures has provided insight into human evolution.